Cremation furnace



A. H. DAVIDSON AND S. SUN DELIUS.

CREMATION FURNACE.

APPLICATION FILED JULY 7,1916. ,421 919; Patented July 4, 1922..

3 SHEETS-SHEET I A. H. DAVIDSON ANDS. SUNDELIUS.

CREMATION FURNACE;

on 1916. 1,421,919, Patented. July 4, 1922.

3'SHEETS-SHEET 2.

mmm; M 1, 04 vwe. M M f NGE A5 R n i n A.IH. DAVIDSON AND S. SUNDELIUS.

CREMATION FURNACE. APPLICATIGN FILED JULY 7,1916.

Patented. July 4, 1922.

3 SHEETS-SHEET 3.

El -553F215) S .FaYFhlhiT ALEXANDER H. DAVIDSON, OF COLMA, AND SEVERUSSUNDELI'US, OF SAN FRANCISCO,

' CALIFORNIA.

CRED'IATION FURNACE.

Marnie.

Application filed July 7,

To all whom it may concern:

Be it known that we, ALEXANDER H. DA- VIDSON, of Colma, California, andSnvnRUs SUNoELIUs, of San Francisco, California, have invented certainnew and useful Improvements in Cremation Furnaces, whereof the followingis a specification.

The invention relates particularly to a crematory having a plurality ofcombustion chambers that can be operated by one heat unit, means forcirculating heated gases through said chambers, means for individuallycontrolling the circulation in each of said chambers; means forconsuming smoke arising from the combustion chambers, means to preventthe transmission of vibration from the furnace to the combustionchambers and means to create a supply of heat.

The primary object of this invention is to provide a crematory of thisnature which shall be highly efioient in operation, which may be easilycontrolled to direct the heat to any one or all of the combustionchambers at any time required. I

With these and other objects in view, the invention aims to generallyimprove crema tories to render them more substantial, practical andcommercially desirable.

In the drawings: v

Figure l is a fragmentaryhorizontal sectional view through a crematoryconstructed in accordance with our invention.

Figure 2 is a vertical sectional view on the plane of line 22 of Figure1.

Figure 3 is a vertical section on plane of line 3-3 of Figure 2, and

Figure 4c is a similar section on the plane of line H of Figure 2.

Referring in detail to the drawings by numerals, 1 designates as anentirety the crematory which is'constructed :withthe combustion chambers2, each of which is formed with a top wall 3, a bottom 4:, and a rearwall 5. A door 6 slidable in guides 7 closes the front end of each ofthe combustion chambers. Each of, these doors is operated by a flexibleconnection 8 which extends upwardly over a pulley 9, as shown in Fig-Specificatio'n of Letters Patent.

Patented July 4, 1922. 1916. Serial No. 107,924.

ure 2, and to any convenient place. The combustion chambers and thefurnace are separated by an open joint 10 which is intended to deadenthesound from the burner or other sources. 7

e open joint 10 prevents vibration of the furnace walls from beingconducted through the walls to the combustion cham ber walls and hence,acts as a sound deadener and also permits air to be entrained into thecombustion chamber.

At the rear end of the combustion chambers is the outside wall 12 of thecrematory and between these chambers and wall 12 is top 13 and belowthis top are arranged a series of fines or passages through which theheated gases circulate as will be hereinafter described.

Each of the combustion chambers is formed in its rear wall with apassage it closed by a door 15. These passages are found convenient incleaning the combustion chambers. A main supply passage or flue 16extends transversely across the rear ends of the combustion chambers 2,and is for the purpose of permitting heated gases or heated air to besupplied to the chambers. Each of said chambers is formed with an inletport or passage 17 in its rear wall which communicates with the passage16; thereby establishing a communication between the chamber and thepassage. In the front end of each of the combustion chambers and at thebottom thereof is formed an escape or discharge port or passage 18 whichcommunicates with a flue 19 running longitudinally along the bottom ofthe chamber to a transverse flue 20 and back of the combustion chambersand if desired outside the crematoryto above the burner. e haveconstructed the crematory with two of these lines or passages 20, onebeing on each side of the transverse center of the structure.

Referring to Figure 3, it will be seen that each of these fluescommunicates by a vertical passage 21 with a horizontal passage 22running parallel to the corresponding passage 20 but above the same.Each passage 22 which may be placed above the burner if desired, leadsto a flue or passage 23, connecting with a chimney 2 1, shown in dottedline in Figures 3 and 4. As the crematory is constructed the same onboth sides of its longitudmal center, we have not thought it necessaryto show the entire construction but have omitted one of the combustioncham-' bers and its associated parts as will be apparent on reference toFig. 1. A plurallty of pipes 25 which form the smoke consuming meansextend transversely through each" of the passages 22'and open into theadjoining passage 16 causing by this arrangement the smoke and gasesarising from the combustion chambers to pass in zig zag between them andby their heated condition destroy all smoke.

To control the flow of hot air or gases into the combustion chambers, wehave provided for each chamber a slide plate or door 26 which closes oropens the corresponding port or passage 17. Each of these doors is"controlled by a flexible connection 27, which extends upwardly outsideof the furnace, as shown in Figures 3 and 4. Another set of doors orslides 28 operated with flexible connections 29 control circulationthrough the passages 19 shown in the same figures.

Under each ofthe combustion chambers and in alignment with the passage18 thereof, we provide a receptacle 30 in which refuse from thecombustion chamber may be collected. These pans may be withdrawn throughthe passage 31 when they are ready for emptying.

Inconnection with the crematory proper previously described, we providea heating plant which may be located at any convenient distance from thecrematory 32, and which is preferably formed with a fire box 33intowhich extend burners 34:. The heated air and gases created by thisburner circulate through the passage 35 of the fire box to the maininlet passage 36 in the main supply passage 16. WVhen the doors 26 andthe doors 28 are opened, the hot gases have a free circulation throughthe combustion chambers and the fines or passages 19, the flues 20, 22and 23, to the chimneys. The casket containing a body is supported bythe ledges 37, shown in Figure 2, projecting from the sides of acombustion chamber, and

it will be seen that the heated gases have a a plurality of combustionchambers, each of which is provided with means for controlling thecirculation of heated gases thereto, whereby any one of said chambersmay be rendered inoperative.

Having thus described our invention and an embodiment of it, in thefull, clear and exact terms required by law, and knowing that itcomprises novel, useful and valuable improvements in the art to which itpertains, we here state that we do not wish to be limited to the preciseconstruction and ,arrangement of the several parts, as herein set forth,asthe same may be variously modified by a skilled mechanic withoutdeparting from the, spirit of the invention.

What we claim and desire tosecur'e by Letters Patent of the UnitedStates, is the following, to wit: 7

1. In a crematory, a plurality of combustion chambers, a main supplypassage to convey heated gases to said combustion chambers, a furnaceconnected to said supply passage, said connection being provided with anopen joint for preventing the transmissionof vibration from the furnaceto the combustion chambers and for permitting the escape port, atransverse flue connected to said longitudinal flue, a. vertical passageconnected to said transverse flue, a horizontal passage connected tosaid vertical passage, a plurality of transverse heated pipes in saidhorizontal passage causing thereby the smoke from the combustion chamberto circulate in zig zag through said passage, a chimney and alongitudinal flue connecting said horizontal passage to said chimney.

3. A crematory comprising in combination a plurality of combustionchambers, a furnace, a main passage adapted to supply heated air andgases from said furnace to said combustion chambers, a second passagecommunicating at one end with said main passage and at its opposite endwith said furnace and provided with an open joint between said furnaceand the main passage, said passage being adapted to convey heated airand gases from said furnace to said main passage, an escape port in eachof said combustion chambers, longitudinal fillies connected to saidescape ports, a transverse flue We have hereto set our hands in thepresence connected to said longitudinal flues, a verof Witnesses this 30day of June, 1916. ti cal passage connected to said transverse ALEXANDERH. DAVIDSON. flue, a horlzontal passage connected to send verticalpassage, a chimney and a longitudi- SEVERUS SUNDELIUS' nal flueconnecting said horizontal passage to Witnesses:

said chimney. F. L. WOLFE,

In testimony that We claim the foregoing, L. A. ALVES.

